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PUBLISHED

CVE-2021-47558

net: stmmac: Disable Tx queues when reconfiguring the interface

Reserved:2024-05-24
Published:2024-05-24
Updated:2024-06-10

Description

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Disable Tx queues when reconfiguring the interface The Tx queues were not disabled in situations where the driver needed to stop the interface to apply a new configuration. This could result in a kernel panic when doing any of the 3 following actions: * reconfiguring the number of queues (ethtool -L) * reconfiguring the size of the ring buffers (ethtool -G) * installing/removing an XDP program (ip l set dev ethX xdp) Prevent the panic by making sure netif_tx_disable is called when stopping an interface. Without this patch, the following kernel panic can be observed when doing any of the actions above: Unable to handle kernel paging request at virtual address ffff80001238d040 [....] Call trace: dwmac4_set_addr+0x8/0x10 dev_hard_start_xmit+0xe4/0x1ac sch_direct_xmit+0xe8/0x39c __dev_queue_xmit+0x3ec/0xaf0 dev_queue_xmit+0x14/0x20 [...] [ end trace 0000000000000002 ]---

Product status

Default status
unaffected

0366f7e06a6b before a92f0eebb8dc
affected

0366f7e06a6b before b270bfe69736
affected

Default status
affected

5.10
affected

Any version before 5.10
unaffected

5.15.6
unaffected

5.16
unaffected

References

https://git.kernel.org/stable/c/a92f0eebb8dc008b9e8c51c6f7b8c93b27a29a43

https://git.kernel.org/stable/c/b270bfe697367776eca2e6759a71d700fb8d82a2

cve.org CVE-2021-47558

nvd.nist.gov CVE-2021-47558

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